Abstract Monosubstituted acetylenes were iodinated to form iodoacetylenes under simple conditions. Reaction of aryl acetylenes with molecular iodine in the presence of 4‐dimethylaminopyridine (DMAP) gave the desired products in good to excellent yields. Iodination of aryl acetylenicketones using K2CO3 as base was also described.
Efficient synthesis of 1-iodoalkynes <i>via</i> Al<sub>2</sub>O<sub>3</sub> mediated reaction of terminal alkynes and <i>N</i>-iodosuccinimide
作者:Ming Yao、Jingjing Zhang、Sen Yang、Hangxing Xiong、Li Li、E. Liu、Hong Shi
DOI:10.1039/d0ra00251h
日期:——
Iodination of terminalalkynes using N-iodosuccinimide (NIS) in the presence of γ-Al2O3 was developed to afford 1-iodoalkynes with good to excellent yields (up to 99%). This described approach featured excellent chemoselectivity, good functional group tolerance, and utilization of an inexpensive catalyst.
开发了在 γ-Al 2 O 3存在下使用N-碘代琥珀酰亚胺 (NIS) 对末端炔进行碘化,以提供良好至优异产率(高达 99%)的 1-碘炔。这种方法具有优异的化学选择性、良好的官能团耐受性以及使用廉价催化剂的特点。
Acetic Acid Promoted Direct Iodination of Terminal Alkynes with N-Iodosuccinimide: Efficient Preparation of 1-Iodoalkynes
作者:Ming Yao、Hangxing Xiong、Jingjing Zhang、Sen Yang、E Liu
DOI:10.1055/s-0040-1708002
日期:2020.7
An efficient and highly chemoselective approach for the direct iodination of terminal alkynes using acetic acid as N-iodosuccinimide activated reagent under metal-free conditions has been developed. This facile process tolerates a variety of terminal alkynes and provides the desired products in good to excellent yields (up to 99%).
Facile and efficient synthesis of 1-haloalkynes via DBU-mediated reaction of terminal alkynes and N-haloimides under mild conditions
作者:Mengru Li、Yueju Li、Baozhong Zhao、Fushun Liang、Long-Yi Jin
DOI:10.1039/c4ra04736b
日期:——
Directly from terminal alkynes and with N-halosuccinimides (halo = Br and I) or N-cholorophthalimide as the halogen sources, DBU as the activator, 1-haloalkynes were prepared in good to excellent yields at room temperature.